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Advanced oxidative processes in the degradation of 17ß-estradiol present on surface waters: kinetics, byproducts and ecotoxicity.
Perondi, Taise; Michelon, William; Junior, Paulo Reis; Knoblauch, Priscila M; Chiareloto, Marilete; de Fátima Peralta Muniz Moreira, Regina; Peralta, Rosely Aparecida; Düsman, Elisângela; Pokrywiecki, Ticiane Sauer.
Afiliación
  • Perondi T; Environmental Engineering Department, Federal University of Technology - Paraná, Francisco Beltrão, Paraná, Brazil.
  • Michelon W; Universidade do Contestado, PMPECSA, Concordia, Santa Catarina, Brazil. william@unc.br.
  • Junior PR; Universidade do Contestado, PMPECSA, Concordia, Santa Catarina, Brazil.
  • Knoblauch PM; Universidade do Contestado, PMPECSA, Concordia, Santa Catarina, Brazil.
  • Chiareloto M; Universidade Estadual do Oeste do Paraná, Cascavel, Brazil.
  • de Fátima Peralta Muniz Moreira R; Department of Chemical and Food Engineering, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil.
  • Peralta RA; Department of Chemical and Food Engineering, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil.
  • Düsman E; Environmental Engineering Department, Federal University of Technology - Paraná, Francisco Beltrão, Paraná, Brazil.
  • Pokrywiecki TS; Environmental Engineering Department, Federal University of Technology - Paraná, Francisco Beltrão, Paraná, Brazil.
Environ Sci Pollut Res Int ; 27(17): 21032-21039, 2020 Jun.
Article en En | MEDLINE | ID: mdl-32266617
Endocrine disruptors represent risks to aquatic ecosystem and humans, and are commonly detected in surface water. Photochemical treatments can be used to remove 17ß-estradiol (E2), but few studies have analyzed the kinetics, intermediates, and 17ß-estradiol degradation pathways in natural matrices. In this study, the photochemical behavior of E2 under ultraviolet irradiation (UVC, 254 nm) associated with oxidants (H2O2 or O3) or photocatalyst (TiO2) was investigated to evaluate the degradation potential and the transformation pathway in a natural surface water matrix. Additionally, computational modeling analyses with Ecological Structure Activity Relationships (ECOSAR) software were performed to predict the toxicity from the E2 and its transformation byproducts. E2 degradation kinetics showed adjusted to the pseudo-first-order kinetic model, being kUV/O3 > kUV/TiO2 > kUV/H2O2 > kUV. Eight transformation byproducts were identified by liquid chromatography with time-of-flight mass spectrometry (HPLC/TOF-MS) in natural surface water samples. These byproducts formed as the result of opening the aromatic ring and adding the hydroxyl radical. The E2 degradation pathway was proposed based on the byproducts identified in this study and in previous studies, suggesting the formation of aliphatic and hydroxylated byproducts. E2 treatment presented both very toxic and not harmful byproducts.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Peróxido de Hidrógeno Tipo de estudio: Prognostic_studies Límite: Humans Idioma: En Revista: Environ Sci Pollut Res Int Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2020 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Alemania
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Peróxido de Hidrógeno Tipo de estudio: Prognostic_studies Límite: Humans Idioma: En Revista: Environ Sci Pollut Res Int Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2020 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Alemania